Scheduler question

I am trying to use the scheduler, but need to un a workflow on different times, dependent on the day (ie: Sunday throughFriday, the process should kick off at 0300, but on Saturday, the process should kick off at 1100)=2E I am able to customize the scheduler to run on a daily basis, but cannot schedule to run at different times on different days=2E Besides creating a duplicate workflow and setting a different start time, is there any way around this?